Sludge drying treatment equipment for sludge blending combustion

Abstract

The invention discloses sludge drying treatment equipment for sludge blending combustion, and relates to the technical field of sludge drying processing. The sludge drying treatment equipment comprises a drying machine body, an air inlet pipe is arranged on the top surface of the drying machine body, an exhaust pipe is arranged on the bottom surface of the drying machine body, and the air inlet pipe and the exhaust pipe are both communicated with the interior of the drying machine body; the interior of the drying machine body is rotationally connected with a roller; the multiple groups of crushing assemblies are uniformly arranged on the inner wall of the roller, each crushing assembly comprises a connecting column, by arranging the crushing assemblies and the driving mechanism, the problem of sludge skin hardening is effectively solved, in the running process of the equipment, when the roller rotates, a pressing rod makes contact with a triangular block of the driving mechanism, and therefore the sludge skin hardening phenomenon is effectively avoided; and a sliding block slides in a sliding groove and extrudes a spring I, so that a dispersion roller on a pressing rod can strongly crush a hardened layer on the surface of the sludge to break the hardened layer on the skin of the sludge, and thus internal moisture can be better evaporated.

Description

Technical Field

[0001] The invention relates to the technical field of sludge drying and processing, in particular to sludge drying treatment equipment used for sludge co-combustion. Background Art

[0002] With my country's socioeconomic development, accelerated urbanization, and improved living standards, the volume of urban domestic sewage has increased dramatically. Sludge, a byproduct of wastewater treatment plants, is rich in harmful substances such as organic matter, bacteria, parasite eggs, and heavy metals, posing a significant environmental risk. Traditional sludge treatment methods include landfill stabilization, composting, land reclamation, and incineration. Sludge incineration is the most thorough sludge treatment method, widely used in developed countries such as Europe, the United States, and Japan. It offers rapid processing, high waste reduction, and energy reuse.

[0003] Sludge incineration can be categorized as direct incineration and co-incineration. Direct incineration utilizes the calorific value of the sludge's organic matter, dehydrating and drying the sludge before burning it in an incinerator. Co-incineration involves mixing sludge with coal or combustible solid waste. The co-incineration of sludge with coal in thermal power plant boilers is a particularly suitable sludge treatment method for my country.

[0004] After searching, it was found that the prior art publication number is CN105417927A, which discloses a sludge dryer, in which the main shaft runs through the entire length of the box and is driven to rotate by an electric motor at one end; a number of circular discs are interspersed on the main shaft, and a number of angle steels are fixed on the outer periphery of the discs. The length of the angle steels is slightly shorter than the length of the box and is radially evenly distributed parallel to the main shaft; sludge pushing inclined shovels and sludge turning flat shovels are arranged at equal intervals on the angle steels and fixed at intervals on the angle steels. The present invention uses hot air to dry the sludge inside the box. The hot air can be generated by the radiator of an electric heating device to generate high-temperature hot air. The equipment is simple and the investment is small. The present invention arranges rotating discs and angle steels, and additionally arranges sludge pushing inclined shovels and sludge turning flat shovels on the angle steels. While turning the sludge, the inclined surface of the inclined shovel is used to move the sludge. The structure is simple, the reliability is good, and it is easy to maintain. At the same time, it has a good drying effect.

[0005] However, the existing sludge drying equipment has the problem of surface hardening when processing sludge, resulting in uneven sludge drying. Under the action of high-temperature hot air, the moisture on the surface of the sludge quickly evaporates to form a dense hard shell. The internal moisture cannot escape due to the barrier of the hard shell, resulting in differences in the moisture content inside and outside the sludge after drying. This unevenness not only reduces the drying efficiency, but also causes incomplete combustion and increased exhaust pollutants in subsequent incineration. The existing equipment relies on mechanical turning and can only loosen the sludge, but cannot effectively break up the hardened layer. In addition, the existing nozzle design is fixed, and the hot air coverage is limited, which can easily cause local overheating or incomplete drying.

[0006] Therefore, based on the above search and in combination with the existing technology, a sludge drying treatment equipment for sludge co-incineration is proposed to solve the above problems. Summary of the Invention

[0007] The object of the present invention is to provide a sludge drying treatment device for sludge co-incineration to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] The exhaust gas fan of the present invention is connected with the exhaust gas fan of the present invention, and the exhaust gas fan of the present invention is connected with the exhaust gas fan of the present invention to the exhaust gas fan of the present invention.

[0010] Preferably, the driving mechanism includes: a connecting ring, which is connected to the inner wall of the drum through a bearing, a circular groove is provided on the outer surface of the connecting ring, a plurality of electromagnets are evenly installed in the circular groove, and a sleeve is rotatably connected to the inner wall of the connecting ring. The driving mechanism also includes an extrusion assembly.

[0011] Preferably, multiple groups of extrusion components are provided and are evenly arranged on the inner wall of the collar. The extrusion components include: a triangular block, which is fixedly mounted on the inner wall of the collar, the inclined surface and the side wall of the triangular block are provided with openings, the top surface of the triangular block and the inner wall of the collar are provided with rectangular grooves, and a nozzle is provided inside the triangular block through a connecting piece.

[0012] Preferably, the connecting member includes: a rotating column, which is rotatably connected to the inner wall of the rectangular groove, a fixed column is fixedly installed on the outer surface of the rotating column, and the bottom surface of the fixed column is connected to the top surface of the nozzle.

[0013] Preferably, the connecting part also includes: a touch rod, which is fixedly mounted on the top surface of the rotating column, and the top surface of the touch rod extends into the circular groove. Springs 2 are provided on both sides of the top surface of the nozzle, and the top surfaces of the two springs 2 are connected to the side walls of the rectangular groove.

[0014] Preferably, a plurality of dispersion rollers are sleeved on the outer surface of the pressure rod.

[0015] Preferably, the collar is made of a magnetic material, and the plurality of electromagnets can drive the collar to rotate.

[0016] Preferably, protective nets are provided on both openings to prevent sludge from entering the triangular block.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention effectively solves the problem of sludge surface hardening by providing a crushing assembly and a driving mechanism. During the operation of the equipment, when the drum rotates, the pressure rod contacts the triangular block of the driving mechanism, causing the slider to slide in the chute and squeeze the spring 1, so that the dispersion roller on the pressure rod can perform a strong crushing action on the hardened layer on the sludge surface, breaking the hardened layer of the sludge surface, thereby allowing the internal moisture to evaporate better. At the same time, the collar rotates counterclockwise under the drive of the electromagnet, which is opposite to the clockwise rotation direction of the drum, increasing the frequency of contact between the pressure rod and the triangular block. This not only speeds up the crushing speed of the sludge and improves the drying efficiency, but also prevents the sludge from forming lumps in the drum, ensuring the uniformity of sludge drying.

[0019] 2. In the present invention, an extrusion assembly is provided, connecting the nozzle to the collar via a connector and enabling it to swing through contact between the touch rod and the electromagnet. This allows the nozzle to evenly spray hot air or drying medium onto the sludge, further enhancing the drying effect. The provision of Spring 2 allows the nozzle to swing under the rebound force after the touch rod passes through the electromagnet, expanding the nozzle's spray range and ensuring uniform heating of the sludge. This uniform hot air distribution not only improves drying efficiency but also avoids localized over-drying or under-drying, thereby enhancing the sludge drying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the left side structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of the drum of the present invention;

[0023] Figure 4 This is a schematic diagram of the overall structure of the crushing assembly of the present invention;

[0024] Figure 5 This is a schematic diagram of the partial structure of the crushing assembly of the present invention;

[0025] Figure 6 Schematic diagram of the overall structure of the driving mechanism of the present invention;

[0026] Figure 7 This is a schematic diagram of the top surface structure of the triangular block of the present invention;

[0027] Figure 8 This is a schematic diagram of the bottom structure of the triangular block of the present invention;

[0028] Figure 9 For the present invention Figure 5 A in the middle is an enlarged structural diagram;

[0029] Figure 10 For the present invention Figure 6 Enlarged structural diagram at point B in the middle.

[0030] In the figure: 1. Dryer body; 2. Air inlet pipe; 3. Exhaust pipe; 4. Drum; 5. Connecting column; 6. Connecting block; 7. Slide groove; 8. Limiting column; 9. Slider; 10. Spring 1; 11. Pressure rod; 12. Dispersion roller; 13. Connecting ring; 14. Circular groove; 15. Electromagnet; 16. Ring; 17. Triangular block; 18. Opening; 19. Protective net; 20. Rectangular groove; 21. Nozzle; 22. Rotating column; 23. Fixed column; 24. Touch rod; 25. Spring 2. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In a typical implementation of this application, please refer to Figures 1 to 10 As shown, a sludge drying treatment equipment for sludge co-combustion includes: a dryer body 1, an air inlet pipe 2 is provided on the top surface of the dryer body 1, an exhaust pipe 3 is provided on the bottom surface of the dryer body 1, and the air inlet pipe 2 is fed with hot air at a temperature of 180-220°C, a wind speed of 5-8m / s, and a hot air flow rate of 2000m 3 / h. Hot air is generated by a gas heater with a thermal efficiency of ≥85%. A negative pressure system is installed in the exhaust pipe 3 to maintain the internal pressure of the dryer body 1 at -50 to -100 Pa, ensuring efficient exhaust gas discharge. The air inlet pipe 2 and the exhaust pipe 3 are both connected to the interior of the dryer body 1. The dryer body 1 is internally connected to a drum 4, which is driven by a variable frequency motor with a speed set at 5-10 revolutions per minute (RPM). The speed can be adjusted according to the sludge moisture content: 5RPM for moisture content above 80%, 8RPM for moisture content between 60% and 80%, and 10RPM for moisture content below 60%. The inner wall of the drum 4 is coated with a wear-resistant tungsten carbide coating.

[0033] As a preferred implementation in this embodiment, please refer to Figure 3 、 Figure 4 and Figure 5 As shown, the crushing assembly is provided with multiple groups of crushing assemblies, and is evenly arranged on the inner wall of the drum 4. The crushing assembly includes: connecting columns 5, two connecting columns 5 are provided, which are respectively arranged on the left and right sides of the inner wall of the exhaust pipe 3, and the connecting columns 5 are made of high-strength alloy steel. The bottom surfaces of the two connecting columns 5 are fixedly installed with connecting blocks 6, and the adjacent surfaces of the two connecting blocks 6 are provided with slide grooves 7. The interiors of the two slide grooves 7 are fixedly installed with limiting columns 8, and the outer surfaces of the two limiting columns 8 are slidably installed with sliders 9. The sliders 9 slide in the slide grooves 7. The top and bottom surfaces of the two sliders 9 are provided with springs 10. The elastic coefficient of the spring 10 is 50N / mm, and the compression stroke is 30mm, ensuring that the impact force on the hardened layer when the pressure rod 11 is reset is ≥200N. The adjacent surfaces of the two sliders 9 are fixedly installed with pressure rods 11, and the outer surfaces of the pressure rods 11 are sleeved with multiple dispersion rollers 12. The dispersion rollers 12 are made of high carbon steel and the surface is nitrided.

[0034] As a preferred implementation in this embodiment, please refer to Figure 6 As shown, the driving mechanism is provided with two groups, which are respectively arranged on both sides of the inside of the drum 4.

[0035] Through the above-mentioned features, the sludge with hardened surface in the drum 4 can be crushed. Specifically, when the drum 4 rotates, the connecting column 5, the connecting block 6 and the pressure rod 11 will all rotate synchronously with the drum 4. During the rotation, the pressure rod 11 touches the driving mechanism, causing the pressure rod 11 to deviate. When the pressure rod 11 deviates, the two sliders 9 will move synchronously with the pressure rod 11, causing the slider 9 to squeeze the corresponding spring 10, causing the spring 10 to deform. When the pressure rod 11 rotates past the driving assembly, the sludge inside the drum 4 will be crushed under the action of the rebound force of the spring 10, and the dispersion roller 12 is used to enhance the crushing effect.

[0036] As a preferred implementation in this embodiment, please refer to Figure 6As shown, the driving mechanism includes: a connecting ring 13, which is connected to the inner wall of the drum 4 through a bearing. A circular groove 14 is provided on the outer surface of the connecting ring 13. A plurality of electromagnets 15 are evenly installed in the circular groove 14. The electromagnets 15 are DC electromagnets with a rated voltage of 24V. They are evenly distributed along the circumference of the circular groove 14 (at intervals of 15°). The power-on frequency is 0.5 seconds / time. They are activated in sequence to form a rotating magnetic field. The inner wall of the connecting ring 13 is rotatably connected to a sleeve 16, which is made of a magnetic material. A plurality of electromagnets 15 can drive the sleeve 16 to rotate. The driving mechanism also includes an extrusion assembly. The sleeve 16 is made of a soft magnetic alloy (Fe-Si). It can be driven by the electromagnet 15 to achieve counterclockwise rotation.

[0037] The above features allow the collar 16 to rotate. Specifically, when the operator energizes the multiple electromagnets 15 in sequence through the controller, the collar 16 rotates in the circular groove 14. This is an existing mature technical means, so it will not be described in detail in the present invention.

[0038] As a preferred implementation in this embodiment, please refer to Figure 3 、 Figure 4 and Figure 6 As shown, there are multiple groups of extrusion components, which are evenly arranged on the inner wall of the collar 16. The extrusion components include: a triangular block 17, which is fixedly mounted on the inner wall of the collar 16. The inclined surface and side wall of the triangular block 17 are provided with openings 18, and the top surface of the triangular block 17 and the inner wall of the collar 16 are provided with rectangular grooves 20. A nozzle 21 is provided inside the triangular block 17 through a connecting piece, and the nozzle 21 is made of high-temperature resistant ceramic material.

[0039] Through the above-mentioned features, the pressure rod 11 can be squeezed to cause it to deviate. Specifically, when the roller 4 rotates and drives the pressure rod 11 to rotate clockwise, during the rotation of the pressure rod 11, it will contact the inclined surface of the triangular block 17. During this process, the slider 9 will squeeze the spring 10 to deform the spring 10. When the pressure rod 11 passes the inclined surface of the triangular block 17, the rebound force of the spring 10 will cause the dispersion roller 12 on the pressure rod 11 to crush the hardened sludge. In addition, the nozzle 21 in the triangular block 17 can dry the crushed sludge to accelerate the drying speed of the sludge.

[0040] In addition, when the collar 16 rotates, the triangular block 17 will rotate synchronously with the collar 16, and the collar 16 rotates counterclockwise. This step can speed up the speed at which the dispersion roller 12 breaks up the hardened sludge.

[0041] As a preferred implementation in this embodiment, please refer to Figures 6 to 8As shown, the connecting member includes: a rotating column 22, which is rotatably connected to the inner wall of the rectangular groove 20, and a fixed column 23 is fixedly installed on the outer surface of the rotating column 22, and the bottom surface of the fixed column 23 is connected to the top surface of the nozzle 21. The connecting member also includes: a touch rod 24, which is fixedly installed on the top surface of the rotating column 22, and the top surface of the touch rod 24 extends into the circular groove 14. Springs 25 are provided on both sides of the top surface of the nozzle 21. The elastic coefficient of the spring 25 is 30N / mm, so that the nozzle 21 swings by ±30°. The top surfaces of the two springs 25 are connected to the side walls of the rectangular groove 20.

[0042] Through the above-mentioned features, the nozzle 21 in the triangular block 17 can be swung while the collar 16 rotates. Specifically, when the collar 16 rotates, the touch rod 24 will contact the electromagnet 15, so that the touch rod 24 drives the rotating column 22 to rotate. When the rotating column 22 rotates, the fixed column 23 on the rotating column 22 drives the nozzle 21 to rotate synchronously. During this process, one of the springs 25 will be deformed by force, and the other spring 25 will be stretched. When the touch rod 24 passes through an electromagnet 15, the nozzle 21 will swing under the action of the rebound force of the two springs 25. When the touch rod 24 contacts the next electromagnet 15, the above steps are repeated.

[0043] As a preferred implementation in this embodiment, please refer to Figure 7 and Figure 8 As shown, a protective net 19 is provided on each of the two openings 18 . The protective net 19 is woven with 316L stainless steel and has a pore size of 1 mm×1 mm. It can intercept sludge particles with a particle size of ≥1.5 mm. The protective net 19 is used to prevent sludge from entering the triangular block 17 .

[0044] Working principle:

[0045] When in use, hot air with a temperature of 180-220°C is introduced into the dryer body 1 through the air inlet pipe 2, with a wind speed of 5-8m / s and a hot air flow rate of 2000m 3 / h, after the hot air enters from the air inlet pipe 2, it is evenly distributed inside the drum 4, providing the required heat and drying medium for sludge drying. At the same time, the rotating device of the drum 4 is started, so that the drum 4 rotates clockwise at the set speed to ensure that the sludge has sufficient residence time and sufficient turning in the drum 4. When the drum 4 rotates, the connecting column 5, the connecting block 6 and the pressure rod 11 will all rotate synchronously with the drum 4. During the rotation process, the pressure rod 11 will periodically contact the inclined surface of the triangular block 17 of the driving mechanism. When the pressure rod 11 contacts the inclined surface, the pressure rod 11 is offset, driving the slider 9 to slide in the slide groove 7, squeezing the spring 10, and causing the spring 10 to deform. At this time, the dispersion roller 12 on the pressure rod 11 also moves accordingly, and begins to perform preliminary squeezing on the hardened layer on the surface of the sludge. As the pressure rod 11 continues to rotate and disengages the inclined surface of the triangular block 17, the spring 10's rebound force quickly resets the pressure rod 11, causing the dispersion roller 12 to vigorously crush the sludge, breaking down the hardened layer on the sludge surface and allowing the internal moisture to evaporate more efficiently. Simultaneously, driven by the electromagnet 15, the collar 16 rotates counterclockwise, opposite the clockwise rotation of the drum 4. This increases the frequency of contact between the pressure rod 11 and the triangular block 17, speeding up the sludge crushing speed of the dispersion roller 12 and improving drying efficiency. Furthermore, as the collar 16 rotates, the contact rod 24 contacts the electromagnet 15, driving the rotating column 22 to rotate, which in turn causes the spray head 21 to rotate synchronously. During this rotation, the spring 25 is deformed and stretched by the force. After the contact rod 24 passes the electromagnet 15, the spray head 21 swings under the rebound force of the spring 25, further expanding the spray range of the spray head 21, enhancing the contact between the hot air or drying medium and the sludge, and improving the drying effect. During the entire drying process, the protective net 19 effectively prevents sludge from entering the interior of the triangular block 17, avoids clogging of the nozzle 21 and other internal structures, and ensures the normal operation of the equipment.

[0046] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A sludge drying treatment equipment for sludge co-incineration, characterized by: include: A dryer body (1), wherein an air inlet pipe (2) is provided on the top surface of the dryer body (1), and an exhaust pipe (3) is provided on the bottom surface of the dryer body (1), wherein both the air inlet pipe (2) and the exhaust pipe (3) are connected to the interior of the dryer body (1), and a drum (4) is rotatably connected to the interior of the dryer body (1); The crushing components are provided in multiple groups and are evenly arranged on the inner wall of the drum (4). The crushing components include: A connecting column (5), wherein two connecting columns (5) are provided and are respectively provided on the left and right sides of the inner wall of the roller (4); a connecting block (6) is fixedly installed on the bottom surface of the two connecting columns (5); a slide groove (7) is provided on the adjacent surfaces of the two connecting blocks (6); a limiting column (8) is fixedly installed inside the two slide grooves (7); a slider (9) is slidably installed on the outer surface of the two limiting columns (8); the slider (9) slides in the slide groove (7); a spring (10) is provided on the top and bottom surfaces of the two sliders (9); a pressure rod (11) is fixedly installed on the adjacent surfaces of the two sliders (9); The driving mechanism comprises two groups, which are respectively arranged on both sides of the interior of the drum (4).

2. The sludge drying treatment equipment for sludge co-incineration according to claim 1, characterized in that: The driving mechanism includes: A connecting ring (13) is connected to the inner wall of the roller (4) through a bearing, a circular groove (14) is provided on the outer surface of the connecting ring (13), a plurality of electromagnets (15) are evenly installed in the circular groove (14), and a sleeve ring (16) is rotatably connected to the inner wall of the connecting ring (13). The driving mechanism also includes an extrusion assembly.

3. The sludge drying treatment equipment for sludge co-incineration according to claim 2, characterized in that: The extrusion components are provided in multiple groups and are evenly arranged on the inner wall of the collar (16), and the extrusion components include: A triangular block (17) is fixedly mounted on the inner wall of the collar (16); the inclined surface and the side wall of the triangular block (17) are both provided with openings (18); the top surface of the triangular block (17) and the inner wall of the collar (16) are both provided with rectangular grooves (20); and a nozzle (21) is provided inside the triangular block (17) via a connecting piece.

4. The sludge drying treatment equipment for sludge co-incineration according to claim 3 is characterized by: Connectors include: A rotating column (22) is rotatably connected to the inner wall of the rectangular groove (20); a fixed column (23) is fixedly installed on the outer surface of the rotating column (22); and the bottom surface of the fixed column (23) is connected to the top surface of the nozzle (21).

5. The sludge drying treatment equipment for sludge co-incineration according to claim 4, characterized in that: The connectors also include: A touch rod (24) is fixedly mounted on the top surface of the rotating column (22), the top surface of the touch rod (24) extends into the circular groove (14), and springs (25) are provided on both sides of the top surface of the nozzle (21), and the top surfaces of the two springs (25) are connected to the side walls of the rectangular groove (20).

6. The sludge drying treatment equipment for sludge co-incineration according to claim 1, characterized in that: A plurality of dispersion rollers (12) are sleeved on the outer surface of the pressure rod (11).

7. The sludge drying treatment equipment for sludge co-incineration according to claim 2, characterized in that: The collar (16) is made of magnetic material, and the plurality of electromagnets (15) can drive the collar (16) to rotate.

8. The sludge drying treatment equipment for sludge co-incineration according to claim 3, characterized in that: A protective net (19) is provided on each of the two openings (18), and the protective net (19) is used to prevent sludge from entering the triangular block (17).

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